Geosense VW PIEZOMETERS, Инструкция по эксплуатации

Страница: 13 / 46

13
Version 1.4 May 09
7. Turn on the readout. Holding the piezometer
cable, lift the transducer out of the bucket,
allowing it to hang vertically downwards and
immediately record 2 or 3 readings. Replace the
transducer in the water as before. After one
minute of immersion, repeat and record another
set of readings. Repeat three times, checking
that the readings displayed are /- 0.5
digits of each other.
8. Record these readings together with the date
and time.
9. Return the transducer to the water with the
open end upwards, but submersed.
10. Obtain and record the barometric
( atmospheric ) pressure for future use. It is
best to use a site based reading but a local
metrological station may be used.
11. Locate the filter in the base of the bucket and
having ensured that the void in the filter housing
is completely filled with water, replace it onto
the piezometer body.
12.
Take great care
with HAE ( High resistance to
Air Entry ) filters. Allow the water pressure to
dissipate through the filter by only applying a
small amount of pressure to the filter body,
leaving time for the water to pass through it.
(Continued from page 12)
(Continued on page 14)